Air translating apparatus



P ,1 K. c. WHITEFIELD 2,407,358

AIR TRANSLATING APPARATUS Filed Sept. 8, 1944 2 Sheets-Sheet l 28 FIG. i.

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WITNESSES: 'INVENTOIR 77 a 52 28 'KYLE-QWm-rEF-IELD. e 61mg. F' 7 2 ATTORNEY 'Sept. 17, 1946. K; c. WHITEFIELD.

AIR TRANSLATING APPARATUS Filed Sept. 8, 1944 2 Sheets-Sheet 2 F'IG.5.

INVENTOR KYLE C.WH|TE.F'IE.LD.

KORNEY WITNEZSSEVS: 0%

Patented Sept. 1 7, 1946 AIR TRAN SLATING APPARATUS Kyle C. Whitefield, Longmeadow, Mass, assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application September 8, 1944, Serial No. 553,177

a 2 Claims. 1

My invention relates to air translating apparatus, and more particularly, to an improved two-fan installation adapted to deliver air to, exhaust air from or recircula-te air in a room or other enclosure.

An object of the invention is to produce an improved apparatus of the type set forth.

A further object of the invention is to produce an improved two-fan installation by means oi" Which admission of air into, withdrawal of air from, and recirculation of air in, a room may be effectively directed with reference to different portions of said room.

A still further object is to provide improved control means whereby operation of said fans may be selectively controlled by a single, easily operated switch.

These and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawings, forming a part of this application, in which:

Fig, 1 is a perspective view showing a two-fan installation embodying my invention mounted on the bottom sill of a window;

Fig. 2 is a section on line II-II of Fig. 1, showing the fans delivering air to the room;

Fig. 3 is a fragmentary view similar to Fig. 2, showing the fans exhausting air from the room;

Fig. 4 is a view similar to Fig. 2, showing the .fans recirculating air in the room; and

Fig. 5 is a diagrammatic view showing the improved switch and control circuit for selectively effecting the various operations of the fans.

In the drawings, there is shown a two-fan installation embodying my invention and mounted on the bottom sill H3 of a conventional window having side J'ambs l2 provided with grooves l4 and It in which are slidably mounted the usual window sashes, one of which is shown at IS.

The fan installation includes a pair of fans and 22 enclosed within an attractive cabinet formed of top and bottom walls 24 and 26, a front wall 28 and side walls 30. The junctions of the side walls 30 with the front wall 28 are preferably rollnded and provided with louvered openings 34. The outer end of the cabinet registers with the window opening and is either entirely unobstructed or fitted with a removable filter 36.

The spaces on either side of the cabinet housing the fans are closed by filler pieces 33 which may be opaque, translucent or transparent. The filler pieces are secured to the window frame by any suitable means, such as straps or brackets and screws 42. Likewise, the ide Walls of the cabinet are secured to the adjacent ends of the filler pieces by any suitable means such as angles- M and screws 46.

The filter 36 is preferably detachably mounted in position. As shown, the filter is slidable in channels formed between blocks or the like 48, projecting from the inner faces of the side walls 30 of the cabinet, and the juxtaposed portions oi the angles 44, as clearly shown in Fig. 2.

The front wall 28 is providedon its inner side with a pad 50 for supporting a control knob 52, having an index or pointer Stand a dial 56 having, marked-oil positions 58, for indicating various modes of operation of the fans 20 and 22 in conjunction with the control mechanism diagrammatically shown in Fig. 5,

In order to be able to direct the flow of air to, or from, different portions of the room, the fans are set at an angle to each other, as shown in Figs. 2, 3 and 4. This angular setting of the fans enables them to deliver outside air to opposite portions of the room, as shown by the arrows in Fig. 2, to exhaust room air from opposite portions of the room, as shown by the arrows in Fig. 3, or to recirculate room air in one direction, as shown by the solid line arrows in Fig. 4, or to recirculate room air in another direction, as shown by the broken linearrows in Fig. 4.

The fans 20 and 22 are driven by single phase capacitor motors M and M which are selectively operated by the control knob 52. The motor M includes a rotor 60, and a field winding formed of two parts 62 and 64 which are connected to an electric lead line L1 by a. wire 66, and to opposite sides of a capacitor 68 by wires 10 and 12. The motor M also includes a rotor 14 and a field winding formed of two parts 76 and 78 which are connected to the lead line L1 by a wire 80, and to opposite sides of a capacitor 82 by wires 86 and 88. As is well known, the direction of rotation of a motor of this type maybe reversed by connectingone part of the field winding or the other in series with the capacitor.

In order to selectively control the operation of either or both of the fans, I provide a'single control switch which is diagrammatically shown in Fig. 5 and which includes contact segments 92, 93, 94, and 96 and a switch or contact arm 98 connected to lead line L2 and adapted to be rotated by the knob 52 into selective engagement with any one or any two of the contact segments to energize or deenergize, or to reverse the direction of rotation of, either or both of the fans. The switch also includes an 01f position I88 to which the arm 98 may be moved When it 3 is desired to shut the power off from both of the motors.

In order to be able to run the motor M in either direction, it is connected by a wire I04 to the contact 96 and by a wire I06 to the contact 94. Therefore, when the circuit is completed through contact 96, the current in the winding 64 will be in phase, and the current in the'winding 62, being in series with the capacitor 68, will be out of phase. The current in the winding 62 will, therefore, lead and the motor M will run in one direction, which for this purpose may be termed the forward direction. When the circuit is completed through the contact 94, the reverse condition prevails and the motor will run in the oppositev direction or backward. It will be noted that the contacts 92 and. 96 are bridged by a wire I08 so that the motor M will run forward whenever the circuit is closed through 'either of these contacts.

The motor M is connected to the contact 95 by a wire I I9 and to the contact 93 by a wire H2 so that, if the circuit is completed through the contact 95, the motor M will run in a forward direction, and if the circuit is completed through the contact 93 the motor will run inthe reverse direction, as explained in connection with motor M Operation.

When it is desired to cause the fan 20, for example, to deliver outside air to the room, the motor IV! of this fan is energized by moving the arm 98 from the off position to position A in which it contacts the segment 92 only and in which the motor will run forward. When it is desired to cause the. fan 20 to withdraw air from the room, the arm 98 is moved to position B in which it engages the contact only. This reverses the direction of operation of motor M The same result can be obtained with reference to the fan 22 by moving the switch arm to position. A or B to energize the motor M through the contact 95 or 93, respectively.

When itis desired to cause both of the fans 9 to deliver-outside air to the room, as shown in Fig. 2, the switch arm is moved ,to position C, in which it engages contacts 96 and 95 which are connected to the corresponding sides of the motor M and M so that both of the motors will run. forward. To cause both of the fans to withdraw air from the room, the switch arm is moved toposition D, in which it engages contacts 93 and 94 to reverse the. operation of both motors. When it is desired to recirculate the room air, it is necessary to have the fans running in opposite directions. To accomplish this, the switch arm may be movedto position E, in which it engages contacts 94 and 95 so that the motor M will run backward while motor M runs forward. This condition is illustrated by the solid lines in Fig. 4. To reverse this condition, the switch arm may be moved to position F, in which it engages the contacts 92 and 93 and in which the M will run forward and motor M will run backward, as illustrated by the broken line arrows in Fig. 4.

By the arrangement above described, it is possible to introduce outside air and to direct such air to either or both of different parts of the room. It is also possible to Withdraw air from one or another part of a room, or to withdraw air from both parts of the room simultaneously. Air may also be recirculated within the room by causing one of the fans to withdraw air from, and the other of the fans to propel air into, the

room.

The filter 36 is made readily removable so that it may be easily removed, ifdesired, when the fans are used for exhausting room air.

It will be seen that by merely moving the knob 52 to positions on the dial 58 which are marked with indicia corresponding to positions A to F, inclusive, the operator can selectively control the operation of the fans to produce any of the effects hereinabove set forth. The fans 29 and 22 may be fixedly mounted in the positions shown, or they may be adjustably mounted so as to vary their angular relationship and the direction of movement of the air propelled by either or both of said fans.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof.

What I claim is:

1. In a device for ventilating a room or other enclosure, a cabinet having a pair of air flow openings communicating with said room and at least one opening leading from said cabinet to a space outside of said room, a fan mounted for moving air through one of said room openings, another fan mounted for moving air through the other of said room openings, a reversible motor for each of said fans and a single switch means movable into one position in which both of said fans Withdraw air from said room and discharge it through said outside opening, into a second position in which both fans draw air through said outside opening and discharge it into said room through said room openings, and into a third position in which one of said fans draws room air through one of said room openings and the other of said fans propels said air into the room through the other of said room openings.

2. The structure recited in claim 1 in which said room openings are disposed in different planes and in which the axis of rotation of each of saidfans is substantially normal to the plane of its respective opening, the axes of rotation of 0 said shafts being at substantially right angles to each other.

KYLE C. WHITEFIELD.

motor 

